Should the surface of the 100 Watt LED touch fully the heatsink?

Thread Starter

mw-b

Joined Mar 14, 2019
11
Hi there. I recently bought a 100 watt LED and a heatsink which has a fan. But the LED is not %100 touching the surface of the heatsink. Here is the size comparison:


Does the LED overheat? Should I buy another heatsink that touches fully the surface of the LED?
 

danadak

Joined Mar 10, 2018
4,057
In general you want the active area of the led array touching the
heatsink, otherwise you can wind up with elevated junction temps
in the led die that do not have good, low, thermal resistance path to
ambient thru heat sink.

If you have an IR thermometer you could power up array at lower current,
and look at die in region where non contact is suspected, to compare with
main region where it does. To get a feel what the magnitude of the problem is.


Regards, Dana.
 
Top